Since the biodegradable case has started crumbling around the button, I (Semafoor) ordered a new button that should enable some additional functionality (volume, previous song) and made a plan for a steel case with some workaround to keep functionality of the nRF module. More info when the button arrives (30-7) the button has arrived(>^_^<) ).

The basic idea is to construct a pyramid with the joystick sticking out of the bottom. The triangular sides will be what Skip2 wits on. As all four triangular sides will be identical, Skip2 will not have an obvious top or bottom. By using the accelerometer to detect the graviational field of the earth, Skip2 will be able to tell which way is up and down, and can thus interpret the joystick movements. These should be as follows

click

hold

up

volume up

unmute

down

volume down

Mute

left

previous song

stop

right

next song

random/shuffle

Because of the accelerometer, this list is always true, regardless of which side is actually facing down.
Although skip2 won't likely be easy to hold in one hand, the shake=shuffle function will be preserved.